Heading-machine.



H. L. SMITH.

HEADiNG MACHINE.

APPLICATION FILED SEPT. 14. l9l6.

Patented Oct. 30,1917.

3 suns-swim 1.

I r1 vsrrfar H. L. SMITH.

HEADING MACHINE.

APFLiCATIQN FILED SEPT. :4. 1916.

Patented Oct. 30, 1917.

3 SHEETSSHEET 2.

lIlllllllllllllllllllll llll m ilrliiil H. L. SMITH.

HEADING MACHINE,

APPLICATION FILED SEPT. 14. 1916.

Patentie 901 a 30, 191?.

3 SHEETSSHEET 3- HENRY L. SMITH, on WATERBURY, coN n'cTicUT,,. issIeNoRTO THE E. J. MA VILLE MACHINE COMPANY, or WATERBURY, coNNEo'TIcUT, nCORPORATION OF ooN- NECTIGUT.

Melamine-MACHINE.

miners:

Specification of Letters Patent.

Patented et. so, 1917;

Applicatien fi led sp'teixibr 14, 1916. seine No. 126,028.

To all mam izimay 00mm: v y I Be it known that I, HENRY L. SMITH, a

citizen of the United States, residing at chine's; of which thefollowing is a specification.

Th n ent o' iire a t jto h typ (i chine for swinging the ends of wirerod into whi ii efi im pi ce it s ei k is fed and the exact length cut;on and Calf: ried over into line with the heading punch and die. v V pThe obj fltof this invention is'to pro yide for a machine bf thischaracter afstock cut off mechanism which is very powerful, du fable andquick in action soth'a't heavy stock will becut'cleanly andsquarely. V vattaining this" end a barrel cam, con nected with a gear that is drivenby a' pinionon the cranksliaft, isarranged' to oscil late a rocker armon a shaft which a rocker leyer, one end of which engage'se li c rri byth p oeat 'ry h d r, an the'b i? end, f, which' if enaged; y wri g ph sehe st being cut in such manner that it ausesthe knife to act on thestock with a q ii'ck' and powerful blow until the piece is sheared Offand then allows the spring to continuelthe movement of the knife andcarry mesa off piece over into linewith th'e punch and d'ie. Theinvention is particularly applicable to what is knowniassingle ormultiple stroke soliddie headers, that is, those heafders which have asolid die and a punchipr punches which act either once or more than onceon each piece of stock that is cutoff and presented to, the die. p p 7,

Fis'u .of the c mp nyi ,,l it 1es shows a. plan view of a well knowndouble stroke soliddief heading machine; proy'ided with a quick cut-offwhich is constructed ac} cording to thi'sinyention. Fig. 2 shows on alarger scale a plan of the cut-off mechanism. Fig. 3 shows asidelelevationofthe cut-ofi' mechanism, Fig. gt is a vi'ew looking fromthe .rdrtward the cut-off mechamsm. Fig-,5 is a" side View of the"cut-ofi" rocker shaft and its cam am; and knife slide 0peratingleyer.'Fig. sis View of the cutoh disassociate'd from" thei rest' ofthemaehine; Fig'fi'i" is'zi View skewing the relative positions of thefeed quill, stock, knife, die and punch at the time the cutter isshearing o'ff a piece of stock.

The machine illustrated has a reciprocato'ry gate 1 that is connected bya crank rod 2 with a. crank 3 0n the shaft i which is provided With thefly wheel 5. In the front end o'f the l' orizontally movable gate is thevertically movable slide 6 which carries the punch holder 7 with thepunch 8. The die 9 is secured in the die block 10 mounted in the end ofthe framell in line with the punch. The stock is fed at the proper timethrough the qu'ill 12 by the feed mechanism 13. As these features of themachine are old and well known they are not further described in detail.I

In these machines after thes'tock has been fed' an'd while the punch isreturning from its stroke, the knife is advanced for cutting off theproperlength of stock and carrying it into line with the punch and die.As the stockisiquite heavy, for instance, it may be ro d a half I inchin diameter, considerable force is required to shear it; In the priormachines that are powerful enough to seyer such stoclgtheiknife moveswith a relatively slow motion and this tends to bend the stock andstretch the metal; leaving uneven and untrue orangular ends. Vfith theimproved cutting mechanism, which forms the subject of this invention.the knife is moved not only very powerfully, but very quickly so that itstrikes the stock with a heavy blow and severe it without bending it,making a clean sheer and leaving square ends.

This is accomplished by connecting a barrel cam 14 with a heavy gear 15that is mounted on the frame so as to be engaged with and driven by apinion 16 on the crankshaft. Running in the cam groove 17 0f the barrelcam is a roller 18 on the end of a rocker arm 19 formed atone end of ashaft 2'Othalt is mountcd-inbearings 21 which are secured to the side ofth e frame. Formed at the other end of this rocker shaftvis a lever 22'.In practice the rocker shaft, rocker arm and rocker lever have been madeof a single heavy steel casting.

The upper end of the rocker lever is rounded and'en'gages a shoe 23located in amortise in the end of a slide 24 which is moyablehorizontally back and forth through'the side of the machine frame on theinner end of this slide is theknife 25, and carried by the slide andprojecting over the cutting edge of the knife are spring fingers '26which are designed to grasp the stock as it is being cut and hold thecut oil piece while it is being carried from cu 1g position into linewith the punch and cam groove in the b rrel cam which oscillates therocker arm is so cut that as the section 27 engages the roll on therocker arm the parts are operated to drive the mife inward very quicklyand powerfully with a positive movement, and following this the wall ofthe cam groove on one side is cutaway so that after the stock is severedthe roll for a time is free from the control of the cam. Engaging withthe lower end of the lever on the rocker shaft is a plunger 28 which isthrust outwardly by a heavy spring 29, these parts being arranged in asocket in the frame which supports the cutting mechanism. After the camhas moved the parts so as to sever the stock and the roll reaches thecut away portion of the cam groove, the spring plunger thrusting againstthe lower end of the lever swings the lever and causes it to push theknife and stock holding fingers farther inward and carrythe stock whichhas been severel from cutting position into line with the punch and die.The knife is preferably started a little away from'the stock so that ithas the momentum of full speed when it strikes the stock for cutting ito f, and thus it gives a quick, powerful, positive blow and not abending or crushing push, and cuts the stock oft squarely.

In some machines it has been found advisable to attach a supportingplate 30 to the punch holder for backing up the inner end of the stockas it is being cut. The end of this supporting plate is beveled (asshown in Fig. 7 so that as the knife moves in and carries the stock overand the punch and punch holder recede, the end of the piece of stockwhich isbeing cut v ill slide down the beveled end of the supportingplate, and the axis of the cut piece will keep parallel with the axis ofthe punch and die, that is, the angle on the end of the supporting plateis made proportionately to the inward movement of the knife and thebackward movement of the punch.

lVith this mechanism the barrel cam is driven very powerfullyand its camgroove is so cut that it gives a quick, powerful, posi tive stroke ofthe knife for severing the stock. The rocker shaft with its arm andlever are strong and durable and they operate quickly and powerfullywith a minimum amount of friction and wear. The knife acts in a.straight line, and as stated with a powerful blow so that it will severheavy stock squarely and truly without bend. The sprin plunger thencauses the knife to carry the severed piece of stock into'line with thepunch and die, and should any part be come mistimed or displaced, forinstance, if a die should pull out so as to obstruct the stock, thespring yields andno damage will i be done.

The invention claimed is:

l. A cut off for heading machine comprising a pinion on the crank-shaft,a gear engaged and driven by said pinion, a barrel cam connected withthe gear, a rocker arm adapted to be oscillated by said cam in a planelongitudinal with relation to the aXis of th cam, a shaft extendingatright angles to the crank-shaft and adapted to be rotarily oscillatedby said rocker arm, alever on said rocker shaft, a slide adapted to bereciprocated parallel with the crank-shaft by the lever, and a knifemounted on said slide.

2. A cut-off for a heading machine comprising a pinion on thecrank-shaft, a gear engaged and driven by said pinion, a barrel camconnected with said geana rocker. arm adapted to be oscillated by thecam, a shaft adapted to lever on said shaft, a, slide adapted to bereciprocated by the upper end of the lever, a knife mounted on saidslide, and a spring plunger thrusting against the lower end of thelever, the cam groove being cut so that the knife slide is first pushedin positively by the cam and then its movement is 001m pleted by thethrust of the spring plunger.

3. A cut off for aheading machine comprising a pinion on thecrank-shaft,a gear engaged and driven by said pinion, a barrel cam connected withthe gear, a rocker arm adapted to be oscillated by'said cam in a planelongitudinal with relation to the axis of the cam, a shaft extending atright angles to the crank-shaft and adapted to be r0- tarily oscillatedby saidrocker arm, alever on said rocker shaft, a slide adapted to bereciprocated parallel with the crank-shaft by the lever, a knife mountedon said slide, and spring holding fingers attached to the slide andhaving bent ends that project .toward each other over the front edge ofthe knife. e

a. A cut-0d for a heading machine having a gear driven barrel cam, arocker arm oscillated by said cam, a shaft turned by; the rocker arm, alever on the rocker shaft, a spring plunger thrusting against the lowerend of the lever, a shoe carried by the upper end of the lever, a slideengaged by said shoe, and a knife mounted on the slide.

5. A cut off for a heading machine com: prising a gear driven barrelcam, a shaft at right angles to the axis of said cam, a rocker armattached to one end of said shaft and engaging said cam, a leverattached to the other end of said shaft, a shoe fitting the upper end ofthe lever, a slide with a recess containing the shoe, a knife attachedbe turned by said rocker arm, a

to the slide, and spring fingers attached to the slide and projectingover the cutting edge of the knife.

6. A cut-ofi for a heading machine having a gear driven barrel earn, arocker arm oscillated by said cam, a shaft turned by said arm, a leveron said rocker shaft, a spring plunger thrusting against one end of saidlever, a slide engaged by the other eild of the lever, and a knifecarried by the s ide.

7. In combination With the crank-shaft and reciprocating punch holder ofa heading machine, of a barrel earn driven from the crank-shaft, arocker arm oscillated by the cam, ashaft turned by the rocker arm, alever on the rocker shaft, a slide reciprocated by the lever, a knifecarried by the slide, stock holding fingers carried by the slide, and abacking plate mounted on the punch holder for supporting the end of thestock while being cut by said knife and held by said fingers.

HENRY L. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

